HIRSTAUL

HIRS transmittance coefficients.

HIRSTAUL is a binary file containing 506-word records provided by the sensor source. Each sensor source has 20 records:

Records 1 through 19 contain transmittance coefficients for channels 1 through 19 of the HIRS instrument.
Record 20 contains other parameters used for radiative transfer calculations.

This file is supplied with McIDAS-X.

For HIRS transmittance coefficients Application Program Interfaces (APIs), refer to the API functions list at the end of this section.

Word	Description
0 - 199	carbon dioxide transmittance coefficients
200 - 319	carbon dioxide angular correction coefficients
320 - 325	continuum transmittance coefficients
326 - 339	water vapor transmittance coefficients
340 - 419	ozone transmittance coefficients
420 - 499	ozone angular correction coefficients
500 - 505	flags indicating whether to use coefficients

Word	Description
0 - 19	central wave numbers of the channels
20 - 59	coefficients for the Planck function
60 - 99	band correction coefficients
100 - 139	reserved
140 - 144	solar coefficients
145 - 157	flux coefficients
158 - 179	reserved
180 - 187	synthetic coefficients for the surface temperature
188 - 189	reserved
190 - 197	empirical coefficients for the surface temperature
198 - 505	reserved

Function	Description
pfcoef	retrieves HIRS Planck function, solar, flux and surface temperature coefficients